Chart.



No. 801,781. PATENTED OGT. 10, 1905. W. B. GLISSON.

GHART.

APPLIGATION FILED APR.27, 1905.

%Unusu n nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn oc lVILLL-\M BAXTERGLISSON, OF RUTHERFORD, TENNESSEE.

CHART.

Specfication of Letters Patent.

Patented Oct. 10, 1905.

Application filed April 27, 1905. Serial No. 257,708.

SON, a citizen of theUnited States, residingat Rutherford, in tle countyof Gibson and State of Tennessee, have invented certain new and usefulImprovements in Charts; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to charts, and more particularly to adjustableholders therefor.

The Object of the invention is to provide a chart-holding frame havingmeans whereby a chart of considerable length can be rolled and unrolledand kept taut during such operation.

Another objectis to provide means for holding the chart at a desiredinclination.

\Vith the above and other objects in view the invention consists of asLmporting-stand upon which is rotatablymounted a stem projectingdownward from a frame containing oppositely-disposed rollers. A chart inthe form of a flexible strip is secured at opposite ends to theserollers and is adapted to be wound thereon and then unwound therefrom.Means are provided for simultaneously rotating the rollers and also fortightening the strip upon the rollers, so as to prevent it from sagging.

The invention also consists of the further novel constructions andcombinations of parts hereinafter more fully described, and pointed outin the claims.

In the accompanying drawings 1 have shown the preferred form of myinvention.

In said drawings, Figure 1 is a perspective view of my improvedchart-holder, a portion thereof being broken away, but indicated bydotted lines. Fig. 2 is a Central vertical section through the holderand showing a chart therein, and Fig. 3 is an enlarged section throughthe spring-pressed drive-sprocket.

Referring to the figures by numerals of reference, 1 1 are standardswhich support a head 2, having a centrally-disposed aperture 3,surrounded by a raised portion 1, constituting a bearing. The standards1 are braced at a point below the head 2 by means of a connection 5,having a slot 6 therein and a depending loop '7. The bearing et supportsa preferably rectangular casing 8, having its lower portion enlargedtransversely, as shown at 9, and its upper portion similarly enlarged,as shown at 10. Between these enlargements and the opposite ends of theframe are removv able panels 11 ada )ted to be secured in any T N l 7 Beit known that I, W ILLIAM BAXTER (J LIsj suitable manner, as by means ofbuttons 12. lVithin the extension 9 is mounted a roller 13, to which issecured one end of a chart 1 1 in the form of a tlexible strip. Thischart extends under a cross-red 15, secured within the frame adjacentroller 13, and the other end of the chart is fastened to a roller 16,which is arranged within the enlargement 10. A sp'ocket 17 is disposedoutside of the frame and is secured to and rotates with roller 16, andmounted on this sprocket is a chain 18, which extends around asprocket19, rotatably mounted on the shaft 20 of roller 13. The innerface of sprocket 19 is provided with shallow recesses adapted to receivepins 21, extending from the shaft 20, and the sprocket is held normallyin engagement with these pins by means of a coiled spring 22, whichbears at opposite ends upon rings 23 and 21, located on shaft 20. Thering 24, as shown in Fig. 3, is preferably integral with the sprocket19. A crank 25 is connectcd to the end of shaft 20. A stem 26 projectsdownward from the center of frame 8 and is rotatably mounted in `theOpening 3 and slot 6. This sten is secured to frame 8 by means of ametal strap 27, which is secured to opposite sides of the stem and tothe bottom of the frame and terininates in a bracing-strap 28, as shownin Fig. 1, said bracing-strap being secured to one side of the frame.That portion of the strap below the 'stem 26 forns a loop 29, to whichis pivoted an angular strip 30, having one end of a looking-strip 31pivoted to it. This locking-strip has a series of notches 32, any one ofwhich is adapted to receive the yeke 7, and a handle 33 extends from thelocking-strip, so that the same can be readily manipulated.

It will be understood that by raising and pulling forward thelooking-strip 31 stem 26 can be swung in the Opening 3, thereby causingthe frame 8 to assune an inclined position. It can be locked byreplacing strip 31 in engagement with loop '7. Roller 13 can be rotatedin either direction by means of crank 25, and rotary motion will betransmitted to roller 16 through chain 18. The chart 1 1 can thereforebeunrolled :from one of the rollers and rolled on the other. Should itbe desired ment thereof.

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same will rotate within the sprocket 19, and thereby cause the lowerroller to rotate independently of the upper one and take up any sag.This independent movement of the shaft and sprocket 19 is permittedbecause of the fact that the sprocket is locked to the shaft by thespring 22, which presses it against the pins 21. When suflicientpressure is exerted, however, the pins will force the sprocket laterallyand permit of independent movement. It will of course be understood thateither or both of the panels 11 can be removed to permit the examinationof the chart.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. In a device of the character described the combination with asupport, of a chartholding frame mounted thereon; a stem depending fromthe frame and rotatably mounted within the support` said stem being alsocapable of swinging in the support, means for manipulating the stem anda securing de- Vice therefor.

2. In a device of the character described the combination with asupport; of a chartholding frame mounted thereon and having holdingframe mounted thereon and having its opposite faces removable, theopposite-ends of the frame being enlarged to accommodate a rolled chart,a stem depending from the frame and rotatably mounted within thesupport, said stem being also capable of swinging in the support, astrap secured upon opposite faces of the stem and to the bottom of theframe for holding the stem and frame together, a manipulating devicepivoted to the strap, and means for securing said device in adjustedposition.

, In testimony whereofIhave signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM BAXTER GLISSON. Witnesses:

J. A. ALFORD,

D. F'. GLIssoN.

